Ambani is the chairman of India’s Reliance Industries Ltd., a company he inherited from his father in 2005.
He was able to make it on to the list of people worth $100 billion or more after his wealth increased by $23.8 billion this year.
The 64-year-old has expanded his energy business to include retail, technology and e-commerce, with the retail and technology sections raising $27 billion last year, according to Bloomberg.
The oil refining and petrochemicals businesses were given to Ambani after his father died in 2002, and a succession dispute broke out between Ambani and his brother since their father did not leave a will. Ambani got the oil refining businesses, while his brother got the power generation, financial services and telecommunications services.
Among the 11 men in the $100 billion club are well-known names such as Warren Buffett, Mark ZuckerbergMark ZuckerbergHillicon Valley — Presented by Xerox — US cracks down on tools for foreign hacking DC AG adds Facebook's Zuckerberg to Cambridge Analytica suit Senator asks Facebook's Zuckerberg to testify at hearing on kids' safety MORE, Jeff BezosJeffrey (Jeff) Preston BezosThe Hill's Morning Report - Presented by Uber - Biden, Democrats dig into legislative specifics Replace Kamala Harris with William Shatner to get kids excited about space exploration Shatner pushes back on Prince William over space flight comments MORE and Elon MuskElon Reeve MuskPrince William urges focus on saving planet instead of space travel Democrats' electric vehicle push sparks intense lobbying fight Blue Origin is taking William Shatner to space — but can it distract from internal criticism? MORE.
Musk is in the top spot at $222.1 billion, while Bezos is in second at $190.8 billion.